Health and Human Services Secretary Kathleen Sebelius has resigned. It was noticeable when President Obama gave his “mission accomplished” speech in the Rose Garden, surrounded by everybody else, and Sebelius was unacknowledged in the speech.

Officials said Ms Sebelius made the decision to resign and was not forced out. I’m somewhat sympathetic. She had an impossible task, trying to make a silk purse out of a sow’s ear. Administration aides have worried that the dreadful problems at HealthCare.gov might result in lasting damage to the president’s legacy. You think? She had an impossible task, nobody can make can make ObamaCare work.

The secretary told the president that the March 31 deadline for sign ups and rising enrollment numbers provided an opportunity for change, and that he would be best served by someone who was not the target of so much political ire, according to Dennis McDonough.” She does hope—all of us hope—that we can get beyond the partisan sniping.”

Nominated to replace her is Sylvia Mathews Burwell, currently head of Obama’s OMB and someone who Obama believes will bring “an intense focus and management acumen to the department.”

Ezra Klein, newly self-described as an advocate of “explanatory journalism” said “Kathleen Sebelius is resigning because ObamaCare has won. President Obama wouldn’t let Sebelius leave unless he was confident ObamaCare was safe.” That’s why he gave her a big hug in the Rose Garden and thanked her profusely for her long five years of service.